The BERMAD model TOO is a specific gravity sensitive valve, for the automatic draining of a heavier fluid from a lighter fluid. Commonly used for the draining of water accumulated in the bottom of petroleum product storage tanks where the stored medium has a lower specific gravity than that of the accumulated water.
The BERMAD model TOR is a normally open specific gravity sensitive valve, which closes upon sensing the lighter of two fluids. It is commonly used as a safety requirement for the draining of rainwater from floating roofs of petroleum product storage tanks. In the event of storage product ingress into the drain tubing, the BERMAD TOR Valve will sense the presence of the product and will immediately close, preventing product loss and spillage.